12181105 has 8 divisors (see below), whose sum is σ = 14762664. Its totient is φ = 9648000.

The previous prime is 12181087. The next prime is 12181111. The reversal of 12181105 is 50118121.

It is a happy number.

12181105 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2835856 + 9345249 = 1684^2 + 3057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12181105 - 2¹⁷ = 12050033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11556 + ... + 12565.

It is an arithmetic number, because the mean of its divisors is an integer number (1845333).

Almost surely, 2^12181105 is an apocalyptic number.

It is an amenable number.

12181105 is a deficient number, since it is larger than the sum of its proper divisors (2581559).

12181105 is a wasteful number, since it uses less digits than its factorization.

12181105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24227.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 12181105 is about 3490.1439798381. The cubic root of 12181105 is about 230.0888440639.

Adding to 12181105 its reverse (50118121), we get a palindrome (62299226).

The spelling of 12181105 in words is "twelve million, one hundred eighty-one thousand, one hundred five".